Hinge for mine-doors



No. 749,561. PATEN'I'ED JAN. 1'2, 1904.

HT. JEFFREY.

HINGE FOR MINE DOORS.

APPLICATION IILBD JUNE 27, 1903.

N0 MODEL.

Invezzfaz 1 W W y j No.749,561.

Patented January 12, 1904.

v UNITED STATES PATENT OFFICE.

THOMPSON JEFFREY, OF PITTSBURG, KENTUCKY.

HINGE FOR MINE-DOORS.

SPECIFICATION forming part of Letters Patent No. 749,561, dated January12, 1904.

Application filed June 27, 1903. Serial No. 163,381. (No model.)

ment of the invention capable of carrying the T all w m i m y COW/087%:same into practical operation, it being under- Be it known that I,THOMPSON JEFFREY, a stood that the elements therein exhibited maycitizen of the United States, residing at Pittsbe varied or changed asto shape, proportion, ,3 burg, in the countyof Laurel and State ofKenand exact manner of assemblage without de- 5 tucky, have inventednewand useful Improveparting from the spirit thereof.

1 ments in Hinges for Mine-Doors, of which the In the drawings, Figure 1is a view in side 5 5 following is a specification. elevation of amine-door employing hinges This invention relates to hinges formineconstructed in accordance with thisinvention. I doors. Fig. 2 is aView in perspective exhibiting the IO As is well known, the main entryor gallery hinges, the door being indicated in dotted lines of coal orother mines is closed by doors which and as partly open. 6o

1 operate to direct the air-blast-into butt entries Referring to thedrawings, 1 designates the or side galleries in order'to effectnecessary side walls of the main entry, which may be of ventilation.Thesedoors are generally opened any material, 2 the lintel or ceiling,and 3 the 3 and closed by boys to permit passage of the base, which maybe the roadway or road-bed. cars along the track laid in the main entryor The door 4, which may be constructed in gallery, and owing tocarelessness on the part any preferred manner, is adapted automatofthese operators the doors are frequently ically to be closed afterhaving been opened left open, causing thereby the cutting off of by themule drawing the car, and to effect this 20 :the air-supply, and thusinconvenience and the hinges employed are so constructed as to oftensuffering ofthe miners. Aside from this, permit the door to open outwardat an upward the employment of boys for the above purpose inclination,so that when released it will by is an expensive item in the operationof a mine gravity resume its normal position. In adand one that thepresent invention aims to dition to this the hinges, or rather the eye 25 eliminate in a thoroughly feasible and prac-' members thereof, areconstructedin such mantical manner. ner as to reinforce the door andrender it ca- The object of this invention, therefore, is in pable ofwithstanding shocks and rough usage, 1 a ready,simple,thoroughly-feasible, and practo which it will be subjected inoperation. As ,tical manner to eifect automatic closing of the hereinshown, two hinges are employed, an 3 doors controlling the passage ofthe blast into upper and a lower one. The upper hinge the butt entriesor side galleries of a mine, comprises an eye member 5 and a pintle 8oand thereby to dispense with the employment member 6, the eye memberbeing bolted or of attendants for the purpose; furthermore, otherwisefirmly secured to the door and the to improve the construction of thedoors in pintle member being provided with a shank 3 5 such manner as torender them thoroughly 7, which bears upon a filler-block 8 andexdurable in use and capable of withstanding the tends through the sidewall of the entry or 8 5 rough usage to which they are necessarily sub-"through a suitable stanchion or stile and is jected in operation.clamped in position by a nut 9, the pintle mem- With the aboveand otherobjects in View, ber being provided with a single pintle 10. 4 as willappear as the nature of the invention The eye of the member 5 comprisesayoke or r is better understood, the same consists in the cleat 11,which is adapted to straddle the door novel construction and combinationof a hinge and to be held firmly in position thereon by for mine-doors,as will be hereinafter fully debolts and nuts, the eye 12 being formedintescribed and, claimed. gral with the yoke. The lower hinge com- 45 Inthe accompanying drawings, forming a prises an eye member 13 and apintle member part of this specification, and in which like 14, which issecured in position in the same characters of reference indicatecorresponding manner as the upper pintle member and carparts, there isillustrated one form of embodiries two pintles 15, which are engaged bya double eye 16, carried by the yoke 17, which is secured to the door inthe same manner as the yoke of the upper hinge. The provision of theseyokes is of importance, as it will be seen that they will operate notonly to effect a positive connection between the eye members and thedoor, but also that the latter are reinforced thereby, and thus renderedmore durable in use. The cleat or filler-block is provided to close thespace between the door and the side wall or stile, so that when the dooris shut there will be no escape of air past it, and this is ofimportance, as otherwise there might be such an escape as wouldmaterially interfere with the proper ventilation of the butt entries orside galleries. The cleat or filler-block also operates to remove strainfrom the pintle member 6 of the upper hinge, as the weight of the dooris transferred from this member to the cleat or filler-blocks and issustained thereby.

While the door and form of hinges employed in this invention areexceedingly simple in construction, they will be foundthoroughlyefficient and durable for the purposes designed and will in aready manner fill a long felt want.

In operation the mule will press against the door and force it open,thereby throwing one of the eyes of the member 10 into engagement withone of the pintles and causing the door to assume an'angular position,and as soon as the car has passed the door it will by gravity be causedautomatically to resume its normal position.

Having thus described the invention, what I claim is The combinationwith a door for mine-galleries, of a pair of hinges each comprising ayoke to straddle the door, and an eye member projecting beyond the yoke,the upper member being provided with a single eye and the lower memberwith a pair of eyes, a pair of pintle members secured to the door-frameand projecting beyond the same, the upper member being provided with asingle pintle and the lower member with a pair of pintles, and afiller-block interposed between the two pintle members and bearingagainst the under side of the upper member and the upper side I of thelower member, said filler-block performing the double function of aclosure for the space between the inner edge of the door and itssupport, thereby to prevent escape of air, and to transmit the strainfrom the upper pintle member to the lower pintle member, thereby in apositive manner to prevent sagging of the door with attendant danger ofthe same binding in its frame, substantially as and for the purposespecified.

In testimony whereof I have hereunto set my hand in presenceof twosubscribing witnesses.

THOMPSON JEFFREY.

Witnesses:

J. W. BASTIN, J. P. Fos'rER.

